chapter 8 Flashcards
Why do we choose random sampling?
- each possible sample of a given size has an equal chance of being selected
-all members of the population have an equal chance of being selected into the sample
sampling WITH replacement is the basis for …
inferential statistics
Experimental designs use what type of sampling
sampling withOUT replacement
priori is
predicting | before data is collected | based on rationalism |
number of events classifiable as A
_________________________________
total number of POSSIBLE events
posteriori is
post-experiement | after data is collected | based on empiricism |
number of times A has occurred
______________________________
total number of occurances
How many cards in a deck
52
how many cards in each suit
13
The addition rule
‘or’
p(A or B) = p(A) + p(B) - p(A and B)
mutually exclusive events
if both events cannot occur together
p(A or B) = p(A) + p(B)
A set is EXHAUSTIVE if…
the set includes all of the possible events
the multiplication rule
‘and’
p(A and B) = p(A) p(B)
independent
the occurrence of one has NO effect on the probability of occurrence of the other
sampling WITH replacement
dependent
the occurrence of one EFFECTS the probability of occurrence of the other
sampling withOUT replacement
μ symbolizes
mean
σ symbolizes
standard deviation
